Tube-machine



F. M. JOSLIN.

TUBE MACHINE.- APPLICATION FILED APR. 23, r920.

Patented Jan. 18,1921.

9 SHEETS-SHEET l.

F. M. JOSLIN.

TUBE MACHINE.

v APPLICATION FILED APR. 23, I920. 1,365,921.

Patented Jan. 18, 1921.

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TUBE MACHINE.

APPLICATION FILED R123. 1920 F. M. JOSLIN.

v TUBE MACHINE. APPLICATION FILED APR. 23, 1920.

1,365,921 Patented Jan. 18, 1921.

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F. M. JOSLIN.

TUBE MACHINE.

APPLICATION mar APR. 23. I920.

Patented Jan. 18, 1921.

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[If a] Motion,

F. M. JOSLIN.

TUBE MACHINE.

APPLICATION FILED APR.23, 1920.

Patented Jan. 18,1921.-

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TUBE MACHINE.

APPLICATION FILED APR. 23. 1920.

Patented Jan- 18, 1921.

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F. M. JOSLIN. TUBE MACHINE. APPLICATION FILED APR. 23. I920.

z 1 m m 2 m I H 98 W a 1T ,E 5\ a mm %M H w a d w a L m n m m T m um w m M Illl III il lllllil IEIIIIIIII F. M. JOSLIN. TUBE MACHINE. APPLICATION men AFH- 2a, 1920.

Patented Jan. 18,1921

9 SHETS-SHEET 9 II N IIII

UNITED STATES PATENT OFFICE.

FRANK M. JOSLIN, OF AMSTERDAM. NEW YORK, ASSIGNOR" T0 -INMAN MANUFAC- TURING COMPANY, INC., OF AMSTERDAM, NEW YORK, A CORPORATION OF NEW YORK.

TUIBEMACHINE.

Patented Jan. 18, 1921.

Application filed April 23, 1920. Serial No. 376,064.

To all whom. it may concern Be it known that I, FRANK M. J OSLIN; a citizen of the United States, and residing at Amsterdam, Montgomery county, State of New York, have invented certain new and useful Improvements in Tube-Machines, of which the following is a specification.

This invention relates to a machine for making tubes from pulp board or similar material. It is designed primarily for the manufacture of tubes intended to be cut into short lengths to form the covers or shells of match boxes and similar containers.

It is the object of the invention to provide a machine for producing tubes of the kind referred to from a strip of material by folding the same about a mandrel and securing the overlapping margins of the strip together to form the completed tube. The invention further contemplates mechanism for applying to the tube at spaced intervals ignition paint which is intended to form the friction ignition surfaces on the shells or covers cut from the tube. The invention also aims to provide mechanism for a 'iplying an antifriction or lubricating pow- (Ier or similar material to the strip whereby its passage throu h the various parts of the machine will be acilitated. In the particular embodiment of the invention hereinafter described, mechanismis also provided for printing the strip with any form of characters desired so that such characters will appear on the covers or shells made from the tube.

The invention further contemplates improvements in various details of the machine by which the same is rendered more effective and serviceable for the purpose intended. f

The invention in one specific embodiment is described in the following specification and illustrated in the accompanying drawmachine, certain parts being omitted;

Fig. 4 is an end view of the machine'looking toward the left in Fig. v1";

Fig. 5 is a-sectional-view on the *line =5-5 of Fig. 1 looking in the direction of the arrows;

Fig. 6 is a cross sectional view on the line 6--6 ofFig. 1* looking in the direction of the arrows;

Fig. 7 is a cross sectional view on the line 77 of Fig. 1 looking in the direction of the arrows;

Fig. 8 is a cross sectional View on the line 8-8 of Fig. '1 and Fig. 2 looking in the direction of the arrows;

Fig. 9 is a cross sectional view on the line 9-9 of Fig. 1', and Fig. 3, looking in the direction of the arrows;

Fig. 10 is a cross sectional view on the line 10- 1O of Fig. 1 and Fig. 3. looking in the direction of the arrows;

Fig. 11 is a cross sectional view on the line 11-11 of Fig. 1 looking in the direction of the arrows;

Fig. 12 is a perspective view of a detached part of the machine showing certain means employed for holding the strip during its travel through the machine; Fig. 13 is a side View, partly in section illustrating certain details of the glue applying mechanism appearing in cross sec tion in Fig. 5;

Fig. 14 is a detailed View illustrating the arrangement of certain of the feed rolls for advancing the material;

Fig. 15 is a longitudinal sectional view through a portion of the machine illustrating principally the mechanism for applying the friction paint to the tube and certain details of the feeding mechanism;

Fig. 16 is a plan view of a portion of the mandrel showing the feed rolls mounted therein;

Fig. 17' is a side elevation of the portion of the mandrel illustrated in Fig. 16;

Fig. 18 is a verticalsectional view through i the central part of the mechanism illustrated in Fig. 17, this figure showing the manner of mounting the feed rolls in the mand r Fig. '19 is a perspective view illustrating the relation between the folding bars for folding the margins of the strip and the mandrel;

Fig. 20 is a sectional view on the line 20-20 of Fig. 15 looking in the direction of the arrows;

Fig. '21 is a perspective view of the man'- Tiil drel about which the material is folded to form the tube;

Fig. 22 is a perspective view showing the form of tube which the machine is intended to produce.

Referring to the drawings in detail and particularly to Figs. 1 1, and 1", it will be understood that certain parts of the mechanism, particularly that intended to print the. strips of material, is mounted on suitable standards A, A, and that other mechanisms intended to support a roll of blank material and to unwind or draw the material from the roll are mounted on supports B, B, in advance of the printing mechanism. he mechanism constituting the principal fea' tures of. the present invention are mounted on a long frame C which is supported by suitable standards D and at various intervals along the frame C, the standards are mounted for supporting various parts of the mechanism hereinafter referred to.

The means for supporting the roll of blank material and the means for drawing the same from such roll may be any ordinary construction, and further reference to the same is unnecessary. The printing mechanism generally designated by the numeral 10 may also be of any desired type and a detailed description of the same is unnecessary. it being understood such printing mechanism is adapted to print the strip of material so as to produce thereon words or characters of any desired nature.

he printing mechanism is caused to operate through the medium of a shaft '11 and this shaft also constitutes the driving means for the strip drawing or unwinding mechanism. The shaft 11 is driven in a. manner hereinafter pointed out.

Mounted beneath the frame 0 of the machine and transversely thereof is a shaft to which constitutes the main driving shaft of the machine. A band wheel 16 is loosely mounted on this shaft. this wheel being driven from any suitable source of power. A clutch mechanism 17 serves to connect the band wheel with and disconnect it from the shaft 15. Means are provided for shi fting the clutch, which comprises a rocking shaft 17 supported from the frame C of the machine and connected to the clutch by an arm 17. Hand levers 17 are provided at "arious intervals along the machine for rocking the shaft 17 and moving the clutch. A gear wheel 18 is mounted on the shaft 1? and this gear wheel meshes with a large. gear wheel 19 secured to the shaft 20. the opposite end of this shaft carrying a gear 21 which meshes with a gear 22 on the shaft 23, which. is arranged above the shaft 20. The shafts 20 and 23 carry a. series of cutters and cooperating rolls 24 and 25 which are adapted to score the strip of material in parallel lines as the same is drawn through the mav wheel 19 chine. The shafts 20 and 23 also carry cooperating cutters 26 and 27 which are adapted to trim the edges of the strip of material. The shafts 20 and 23") are supported in standards designated by the characters F, F.

The shaft 20 on the end opposite the gen carries a sprocket wheel ill with which a sprocket chain ill engages. this sprocket chain also engaging a sprocket wheel 32 secured to a stub shaft 32) to which shaft a beveled gear I'll is also secured. The beveled gear at cooperates with a simiL-ir gear 35 secured to the shaft 1 1 heretofore referred to. The foregoing mechanism constitutes the means by which the shaft It is driven, this shaft. as before stated. constit lll ing means for operating the printing mechanism and the strip clraiv'im; mechanism here tofore mentioned.

The stub shaft 33 also carries a near \Ylltt'l which through a suitable train of ear:-* is adapted to operate the mechanism employed for applying the lubricating material to tlu strip and another train of :cars opcratcd from said shaft 33 constitutes the means for driving the glue applying mechanism hero inafter referred to. Certain of these years will be specifically referred to later. From said shaft 33 power is also obtained thiongrh suitable gears for driving certain of lllo feed rollsemploycd in feeding the lllllltl'llll through the machine.

After passing the. printing mechanism til" strip of material from which the tube is to be produced passes through the mcclmnism for applying the lubricating powder or other material thereto. This mechanism. as shown particularly in Fig. comprises a receptacle 4.0 in which powdered soapstone or similar material is placed. shaft ll passes through this receptacle. this .sha ft being driven by a suital'ile gear l2 colnd it ut inn; part of the first train of s.rcars heretofore referred. to. Secured to the shaft ll is a rod or bale 43 which is adapted to transfer the lubricating material from the receptacle to a dusting roll 4-4: which is arranged above said receptacle l l and mounted on a sba ft 45, this shaft being driven by a suitable gear 46 secured. thereto. which latter near :Ylr o constitutes part of the first train of grain above mentioned. A small roll l7 secured to shaft 48 is arranged above and ('Uillltliiftg-4 with the dusting roll -ll-. the slia ft n being idly mounted in suitable supports. it will be understood that the lubricating material which is in the form of powdered soapstone or similar material is transferred by the ba lo 43 to the dusting roll tit, which roll is positioned to contact with the underside of the strip of material as it passes through the machine, the result being that the strip of material is lubricated on one side which facilitates its passage. through the various Ttl t ll

lllTi lift] llltl parts of the machine hereinafter referred to. After passing the lubricating mechanism the material comes in contact with feed rolls mounted upon a shaft 51, this shaft being driven by a gear 52 which cooperates with a similar gear 53 mounted 011 a second shaft 54 to which the feed rolls are secured, the rolls 50 and 55 cooperating to feed the material. The shafts 51 and 54% and the: gear wheels 52 and 53 are driven from the first train of gears heretofore referred to, the shafts being mounted in suitable supports 11), E secured to the frame C.

After passing the feeding rolls heretofore described, the material led past the glue applying mechanism which is illustrated particularly in Fig. This mechanism comprises two rolls and (31 mounted upon shafts 62 and 63, to which gears 64: and 65 are secured. The gear (54L constitutes part of the second train of gears heretofore mentioned. The gear 64 meshes with a gear 66 secured to a shaft 67 which carries a roll (58, this roll being mounted to rotate inv a receptacle 69 intended to receive a supply of glue. The roll 68 is so positioned as to contact with the roll 60 heretofore referred to so that glue is transferred from the former t0 the latter as these rolls are rotated. The rolls 60 and 61 are so positioned as to contact with one margin of the strip of material as it passes through the machine and since the roll 60 is supplied with glue in the manner heretofore described, it follows that the strip of material as it passes through this mechanism will receive glue along one margin thereof, the purpose of which willv hereinafter appear.

After passing the glue applying mecha nism the strip of material is led past the scoring cutters and rolls 2 1, 25 which have already been described.

The shaft 20 adjacent the gear 19 carries a sprocket wheel 70 with which a sprocket chain 71 engages, this sprocket chain also engaging the sprocket wheel 72 mounted on. a shaft 73 journaled in suitable standards (i secured to the frame (7. The shaft 73 carries a gear 74- which cooperates with a gca r 75 secured to a shaft 76 also mounted in the standards (i. The shafts 7?) and 76 carry cooperating feed rolls 77 and 78 which are positioned to contact with opposite sides of the strip of material and feed the same through the machine.

T he shaft 73 adjacent the gear 74. also carries a sprocket wheel 80 with which the sprocket chain 81 coii iieratcs. The sprocket chain. 81 constitutes the means for driving certain parts of the mechanism liereimtfter referred to.

On the end of the shaft 20 adjacent the syu'ocket wheel 30 there is secured a gear wheel 82 which meshes with a gear 83 secured to a shaft extending transversely of the frame C. This shaft carries a beveled gear 8 1 which cooperates with a similar gear 85 secured to a shaft 86 extending longitudinally of the machine. At its forward end the shaft 86 carries a gear wheel. 87 which meshes with a wheel 88 secured to a shaft 89 which also extends longitudinally of the machine. The shaft 89 constitutes the means for driving certain parts of the mechanism which will later be described.

Mounted on the frame C at the rear of the rolls 77, 78, heretofore described. is a bed plate 90 which extends along the entire length of the machine from a point adjacent said rolls 7'? and T8 to where the material is finally discharged from the machine.

Immediately adjacent the rolls 77 and 78 a, presser bar 91 is loosely mounted above the plate 90. this presser bar being held in position by a flexible transverse men which is secured to the bar 91 and which is adapted to be inserted beneath keepers 93 cured to the bed plate 90. The n'esscr bar 91 is adapted to rest by its own weight on the top of the strip of material. as it 'iasses through the machin: and constitutes means by which. the material. is held in proper position.

Adjacent the rear end of the presser bar 91 two standards 95 are mounted in the frame C of the machine and between. these standards a cross bar 96 extends. A bolt 97 is secured in the bar 96 by means of nuts 98, these nuts constituting means by which the bolt can be accurately adjusted with reference to the cross bar 96. Secured to the lower end of this bolt 97 is a mandrel 100 which constitutes the principal meam-i for shaping the tube which. the machine is in tended to produce. This mandrel. extends from. its point of support by bolt 97 to a point near the end of the machine and unsu iported exceptthrough the medium of the bolt 97. It is intended to rest upon the strip of material 'iassing over the bed plate 90.

Secured to the bed. plate 90 adjacent the front end of the mandrel. 100 is a guide plate 101 which is positioned to contact with the edge of the strip of the material and bend the same l1()\.'2ll.'(l the mandrel. A. similar guide plate 102 is also secured to the bed. plate )0 opposite the guide plate 1.01.. which also serves to bend one n'iargiu of the strip toward the |nmulrcl.. Other guide plates 10%. ill-l 1.05. 105. and 107 are positioned to contact with thematerial and cause the same to be folded and held in position against the mandrel 100.

Referring to Fig. 21 it will be noted that the mandrel 100 is rectangular in form and is slotted as shown at .110. the purpose of which slot will now be described. Journaled in suitable standards H, H of the machine are two shafts 111. 112 the shaft 111' carrying a sprocket wheel 113 which is positioned to be engaged and rotated by the sprocket chain 81 heretofore mentioned. The shaft 111 also carries a gear 111 which meshes with a gear 115 secured to the shaft 112. The shaft 112 carries a narrow feed roll 116 which is so arranged as to extend through the slot 110 in the mandrel 100 and this roll coiiperates with a feed roll 117 secured to the shaft 111 heretofore referred to. The feed rolls 116 and 117 are so positioned as to contact with and feed the strip of material during its passage beneath the mandrel 100.

At the rear of the feed rolls 116, 117, two standards 120 and 121 are secured to the frame C of the machine. These standards are adapted to support the folding bars 122 and 123, the ends of which are so positioned as to contact with and fold the margins of the material toward the mandrel. The folding bars 122 and 123 are mounted in suitable members 12 1 and 125 which are clamped to said standards 120 and 121. These folding bars cause the margins of the strip to overlap and contact with each other and since one of these margins has previously received an application of glue as heretofore pointed out, they are thus caused to adhere.

At the rear of the folding bars heretofore referred to, suitable standards L, L, are secured to the frame C of the machine. Two shafts and 131 are journaled in these standards. The shaft 130 carries at one end a sprocket wheel 132 which engages and receives motion from the sprocket chain 81 hertofore referred to. The shaft 130 also carries a gear 133 which, through the medium of two small gears 13 1 and 13-1 drives a gear 135 secured to the shaft 131. The shafts 130 and 131 carry feed rolls 136 and 137, the former being positioned to contact with the undersurfacc of the mandrel and the latter with the upper surface of the mandrel so that these two rolls together constitute means for causing the material which has been folded about the mandrel to move along the same.

At the rear of the feed rolls 136 and 137 two standards 138 and 139 are secured to the bed plate 90 These standards constitute means for holding in position a heavy presser plate 140 which is intended to be placed above the mandrel 100, this presser plate being provided with a cross bar 1 1 which is adapted to loosely engage with the standards 138 and 139. The presser plate l i-4) constitutes means for compressing and holding the folded margins of the strip in con tact so as to afford opportunity for the parts to become firmly fastened by the glue.

Referring to Figs. 16, 17, 13 and 21, it will be noted that two feed rolls and 151 are carried by the mandrel 100, these feed rolls being mounted in suitable plates 152 secured to the opposite side of the mandrel, the shafts of the feed rolls being journaled in these plates. The feed rolls 150 and 151 are provided with roller bearings 150 and 151, as clearly shown in Fig. 18 of the drawings. It will be understood that the feed rolls 150 and 151 are so positioned as to coiiperatc with the rolls 137 and 138 previously described.

The mechanism heretofore described serves to complete the formation of the tube which as shown at K Fig. 22 is rectangular in form, it being undersistood that in producing such rectangular tube, the material is bent or folded along the lines on which it was scored by the mechanism heretofore d escribed. Tn order to prepare the tube for certain uses such as the formation of match box covers or shells, it is desirable to apply to opposite sides of the same a material which will produce a friction surface to serve for the purpose of igniting matches, and mechanism is therefore provided for apply ing what is termed ignition paint to opposite sides of the tube at spaced intervals. This mechanism will now be described.

The sprocket chain 81 heretofore referred to engages a sprocket wheel mounted on a stub shaft secured to the frame (l of the machine. This shaft carries a. gear 160" which meshes with a gear 161 also mounted on a stub shaft secured in fixed position to the frame of the machine. The gear 161 meshes with a gear 162 secured to a shaft 162 on which a. roll 163 is mounted. The gear 162 meshes with a gear 164: mounted on a shaft 165 which carries a roll 166. The roll 166 is arranged to rotate in a receptacle 167 which is intended to contain the friction paint. The roll 166 is positioned so as to contact with the roll 163 heretofore referred to so that the last mentioned roll is supplied with paint from the roll 166. A plate 168 is pivoted upon suitable standards secured to the receptacle 167, which plate is yielclingly held in contact with the roll 166 by means of a spring 168, this plate constituting means for scraping surplus material fro nithe roll 166 when the same is rotated.

A small gear 170 is also positioned to en gage with the gear 162, the gear 170 driving a. second gear 170 which meshes with a gear 171 secured to a shaft 171, on which a roll 17.2 is mounted, the roll 172 being positioned above the roll 163 above referred to andv both of these rolls being mounted in suitable fixed supports K. K, secured to the frame of the machine. The gear 171 meshes with a gear 173 secured to a shaft 173 which carries a roll 17 4 which is similar to the roll 166 heretofore referred to. The roll 171 is mounted in a receptacle 175 which is adapted to contain friction paint. A pivoted plate 176 mounted on suitable standards in the receptacle 175 is yieldingly held by a spring 177 against the roll 17 1, this plate serving to remove excess material from the roll.

It will be noted that the rolls 163 and 17 2 are grooved at regular intervals on their surface parallel with the axis of the rolls. The result is that the surface of these rolls is divided up into a plurality of sections which constitute the paint applying surfaces. By reason of this construction it follows that the ignition paint will be applied at intervals along the length of the tube. It is to be understood the roll 163 is so positioned as to apply paint to the under surface of the tube which is being carried along the mandrel 100 and that the roll 172 is intended to apply paint to the opposite or upper surface of the tube. It is also to be understood that these rolls are so aranged that their paint applying surfaces contact with the tube at the same time so that the painted and unpainted portions of the tube on the two surfaces are directly opposite each other.

Mechanism is provided for cutting off desired lengths of the tube after it has been finished and the ignition paint applied. This mechanism comprises fixed guides 180, 181, between which the tube is caused to pass. These guides are so spaced that the tube which has been formed of rectangular shape must be compressed or flattened and it will be noted (Fig. 21 of the drawings) that the end of the mandrel is cut away or bev eled at a point 100*" to facilitate such flattening of the tube. After passing the guides 180, 181., the tube passes adjacent the reciprocating cutter 182 which is secured to a gear wheel 183 suitably supported from the frame C of the machine, this cutter cooperating with a fixed cutter 182*. A. segmental gear 184 meshes with the gear wheel 183, this segmental gear being mounted on one end of a bell crank lever 185, the other end of which carries a pin 186 which is mounted in a cam groove 187 formed in a wheel 188 secured to the shaft 89, heretofore referred to. It will be understood that the mechanism just described constitutes means for severing the tube at desired intervals, and it may be so timed as to cut the tube at the points where no paint has been applied.

The function of the various parts of the machine have already been pointed out and a brief statement of its operation will suffice. The strip of blank material being drawn from a suitable source of supply passes first to the printing mechanism 10, 10 where it receives printed or other desired characters, such as illustrations, trade-marks, etc. The material then passes to the lubricating mechanism where the dusting roll 44 applies suitable powdered lubricating or anti-friction material. After passing through the feed rolls 50, 55, glue is applied to one margin of the strip by the glue roll 60. The strip then passes through the scoring mechanism 2 1:, which scores the same along parallel lines. It is then led through the feed rolls 77, "T8, beneath the presser bar 91 and then beneath the mandrel 100, where it contacts with feed rolls 116, 117. By means of suitable guide plates 101, 102, 103, 10st, 105, 106 and 107. the sides of the strip are folded against the mandrel 100 and the folding bars 122, 123 finally fold the margins thereof together upon the top of the mandrel, these margins being caused to adhere by the glue previously applied to one of the same. As the material, now in the form of a tube, moves forward over the mandrel, the presser plate 1 10 acts to hold the glued margins together and the feed rolls 136. 137, cooperating with rolls 150, 151 mounted in the mandrel, serve to move the finished tube along the mandrel. By means of the rolls 163 1'72 the friction paint is applied to opposite sides of the tube and the same is finally out into desired lengths by the cutter 182, 182 arranged at the end of the machine.

It is apparent that numerous modifications may be made in the foregoing details of the various mechanisms without departing from the spirit of the invention which is intended to include constructions fairly comprehended Within the scope of the appended claims.

What is claimed as new and desired to be secured by Letters Patent is:

1. A machine of the kind described comprising means for feeding a strip of material, means for applying a lubricating material to the strip, a mandrel, and means for folding the strip about the mandrel and bringing the margins thereof together to form a tube.

2. In a machine of the kind described the combination of means for feeding a strip of material and means for applying'a lubricating material thereto, said last named means comprising, a receptacle for containing the lubricating material, and a dusting roll for applying the lubricating material to the strip and driving mechanism for said dusting roll.

In a machine of the kind described, the combination of means for feeding a strip of material, a dusting roll mounted adjacent the line of travel of said strip for applying a lubricating material to said strip, a receptacle for containing the lubricating material, means for intermittently transferring lubricating material from said receptacle to said dusting roll.

4. In a machine of the kind described, the combination of a bed plate, a mandrel mounted above said bed plate, means for feeding a strip of material over said bed plate and beneath said mandrel, means for Cir folding the strip about the mandrel, and means for supplying lubricating material to one side of the strip to facilitate the passage of the same beneath said mandrel and through said folding means.

5. in a machine of the kind described, means for feeding a strip of material, means for forming the strip into a tube, and means for applying a lubricating material to the strip to facilitate its passage through said forming means.

6. In a machine of the kind described, the combination of a mandrel, means for feeding a strip of material, means for bonding the strip around the mandrel to form a tube, means arranged beneath said mandrel for applying ignition paint at intervals to one side of the tube, and similar means arranged above said mandrel for applying ignition paint at similar intervals to the opposite side of the tube, said paint applying means being connected to operate in unison.

In a machine of the kind described, the combination of a mandrel, means for feeding a strip of material, means for bending the strip around the mandrel to form a tube, a paint applying wheel arranged beneath said mandrel and positioned to contact with the tube on the mandrel, the out-er face of said Wheel being divided into a plurality of spaced surfaces, a paint applying wheel arranged above said mandrel and also positioned to contact with the tube on the mandrel, the outer face of said last named \vheel also being divided into a plurality of spaced surfaces, means for causing said Wheels to operate in unison to simultaneously apglv paint to the opposite sides of the tube, and means for supplying ignition paint to each of said Wheels.

8. In a machine of the kind described the combination of a bed plate, means for feeding a strip of material thereover, a presser bar positioned to lie by its ovvn Weight on said material as it passes over said bed plate. and means for removably holding said presser bar above said bed plate.

9. In a machine of the kind described, the combination of a bed plate, a rectangular mandrel mounted above said bed plate, said mandrel having a. slot extending throu h the same a shaft arraiwed above said mandrel, a feed roll mounted on said shaft extending into the slot of said mandrel, and a second feed roll mounted beneath the first named roll and in cooperative relation with the first named roll.

10. In a machine of the kind described, mandrel having a slot extending through the same, a feed roll rotatably supported above said mandrel and extending through said slot and into position to contact with the material passing beneath said mandrel.

11. In a machine of the kind described, a

mandrel having a slot extending therethrough, a feed roll rotatably supported above said mandrel and extending into said slot, :1 second feed roll mounted beneath the mandrel and cooperating with said first named feed roll, and means for rotating the said feed rolls.

12. in a machine of the ldud described, the combination of a rectangular mandrel, means for feeding a strip of material beneath said mandrel, means for folding the strip against the vertical sides of the mandrel with the edges thereof extending above the upper surface of the mandrel, a folding bar secured at one side of the mandrel and extending toivard the rear part of the machine with its free end overlying the lop of the mandrel and positionci'l to fold one edge of the strip against the mandrel. :1 second folding bar secured at the other side of the mandrel and extei'iding toward the rear part of the machine and having its free end overlying the top o f the mandrel at a point to the rear of the end of the lirsi. named bar, said second named bar being positioned to fold the other edge of the strip upon the previously folded edge thereof.

in a machine of the kind described. the combination of a rectangular mandrel, means for feeding a strip of material beneath said mandrel, means for folding the strip against the vertical sides of the mandrel with the edges thereof extending above the upper surface of the mandrel, folding bars secured on opposite sides of the mandrel and each extending toward the rear of the machine at an angle to said mandrel, the free end of each of said bars overlying the top of the mandrel, one of said bars being margin of the strip against the mandrel and the other being positioned to fold the other nmrgin on the previously folded margin.

In a machine of the kind described. the combination of means for feeding a strip of material, a mandrel, means for folding the strip about the mandrel to form a tube. and a presser plate arranged above said mandrel and positioned to bear by its own weight against the folded margins of the strip.

15. In a machine of the kind described, a bed plate, means for feeding a strip of niaterial thereovcr, a presscr bar arranged above said bed plate and adapted to rest 3 by its own weight on the strip of material passing beneath the same, a mandrel, means for folding the strip above the mandrel to positioned to contact with and fold one i form a tube, a presser plate arrangcd above said mandrel and adapted to rest by its own Weight upon the folded margins of the strip to compress the same, and means for loosely holding said bar and said plate in position.

In testimony whereof I aliix my signature.

FRANK M. JOSLIN. 

